“…This is also seen when comparing the M06 computations to X-ray crystallography data [32], with CÀC, CÀO, OÀN, and N=O bonds being slightly underestimated by 0.00185, 0.0195, 0.0028, and 0.0036 respectively. Likewise, all computed angles compare favorably with previously reported data [20,23,32,33], with average deviations of less than 1 degree. NG and other similar molecules have been previously studied utilizing DFT methods, primarily with the B3LYP functional [13,20,22,23,[34][35][36][37][38][39].…”